package com.hmdp.utils;

import cn.hutool.core.io.resource.ClassPathResource;
import cn.hutool.core.lang.UUID;
import org.springframework.core.io.Resource;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.script.DefaultRedisScript;

import java.util.Collections;
import java.util.concurrent.TimeUnit;

/**
 * CLassName: SimpleRedisLcok
 * Description:
 * Author: wuzhixiang
 * Date: 2024-11-02 13:06
 * Version: 1.0
 */
public class SimpleRedisLcok implements ILock{

    private StringRedisTemplate stringRedisTemplate;
    private String name;

    public SimpleRedisLcok(String name, StringRedisTemplate stringRedisTemplate) {
        this.name = name;
        this.stringRedisTemplate = stringRedisTemplate;
    }

    private static final String KEY_PREFIX = "lock:";
    private static final String ID_PREFIX = UUID.randomUUID().toString(true) + "-";
    /*private static final DefaultRedisScript<Long> UNLOCK_SCRIPT;
    static {
        UNLOCK_SCRIPT = new DefaultRedisScript<>();
        UNLOCK_SCRIPT.setLocation((Resource) new ClassPathResource("seckill.lua"));
        UNLOCK_SCRIPT.setResultType(Long.class);
    }*/


    @Override
    public boolean tryLock(long timeoutSec) {
        //获取线程标识
        String threadId = ID_PREFIX + Thread.currentThread().getId();
        //获取锁
        Boolean success = stringRedisTemplate.opsForValue()
                .setIfPresent(KEY_PREFIX + name, threadId, timeoutSec, TimeUnit.SECONDS);
        return success.TRUE.equals(success);
    }

    @Override
    public void unlock() {
        //调用lua脚本
        /*stringRedisTemplate.execute(UNLOCK_SCRIPT, Collections.singletonList(KEY_PREFIX+name),
                ID_PREFIX+Thread.currentThread().getId());*/
    }

    /*@Override
    public void unlock() {
        //获取线程标识
        String threadId = ID_PREFIX + Thread.currentThread().getId();
        //获取锁中的标识
        String lockID = stringRedisTemplate.opsForValue().get(KEY_PREFIX + name);
        //判断是否一致
        if(lockID.equals(threadId)) {
            stringRedisTemplate.delete(KEY_PREFIX + name);
        }
    }*/
}
